The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 07, 1999
Filed:
Nov. 12, 1997
Michael A Ward, Lexington, MA (US);
Ignition Systems International, LLC., Arlington, MA (US);
Abstract
An improved high energy high efficiency hybrid capacitive/inductive ignition system with one or coils Ti for internal combustion engines employing one or more energy storage capacitor means (4) shunted by diode means (9), with high leakage inductor means (3a) of coils Ti with which have their primary (1a) and secondary (1b) windings wound side-by-side on a single segmented bobbin 72, unidirectional switches Si for each coil Ti which are preferably IGBTs, and high efficiency shunt diode/switch means SDi for each coil Ti shunting the primary winding of each coil Ti, so that, following production of an initial quarter cycle capacitive spark with peak current in the 0.2 to 3 amp arc discharge range, there is a decaying inductive unidirectional flow-resistant spark flowing through shunt switch means SDi.